ICD-10-CM > S00-T88 > T51-T65 > T63 > T63.3 > T63.31 > T63.312 T63.312 Toxic effect of venom of black widow spider, intentional self-harm Non-Billable/Non-Specific Codes T63.312A..., initial encounterT63.312D..., subsequent encounterT63.312S..., sequela